[INFO] crate core_rustc-serialize 0.3.20-v0.3.19patch1 is already in cache
[INFO] checking core_rustc-serialize-0.3.20-v0.3.19patch1 against master#c9edc02e8320a9e5799d185910ece7d491f524e6 for pr-64398
[INFO] extracting crate core_rustc-serialize 0.3.20-v0.3.19patch1 into work/builds/worker-0/source
[INFO] validating manifest of crates.io crate core_rustc-serialize 0.3.20-v0.3.19patch1 on toolchain c9edc02e8320a9e5799d185910ece7d491f524e6-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate core_rustc-serialize 0.3.20-v0.3.19patch1
[INFO] finished tweaking crates.io crate core_rustc-serialize 0.3.20-v0.3.19patch1
[INFO] tweaked toml for crates.io crate core_rustc-serialize 0.3.20-v0.3.19patch1 written to work/builds/worker-0/source/Cargo.toml
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f0fe5a6d1f84267171ae47858f0c35d1a70529b1646688914d6b2fb770b7e6b5
[INFO] running `"docker" "start" "-a" "f0fe5a6d1f84267171ae47858f0c35d1a70529b1646688914d6b2fb770b7e6b5"`
[INFO] [stderr]    Compiling core_collections v0.3.20170409
[INFO] [stderr] error: failed to run custom build command for `core_collections v0.3.20170409`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/core_collections-53c396fb324848ac/build-script-build` (exit code: 101)
[INFO] [stderr] --- stderr
[INFO] [stderr] thread 'main' panicked at 'Unknown compiler version, upgrade core_collections?', src/libcore/option.rs:1190:5
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x55baef15df84 - backtrace::backtrace::libunwind::trace::h07e9553c1ad1ecad
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.37/src/backtrace/libunwind.rs:88
[INFO] [stderr]    1:     0x55baef15df84 - backtrace::backtrace::trace_unsynchronized::h9e0e5a535fa6ae0f
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.37/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x55baef15df84 - std::sys_common::backtrace::_print_fmt::h4b577ea24f321ffb
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:77
[INFO] [stderr]    3:     0x55baef15df84 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::ha28161264835f4f4
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:61
[INFO] [stderr]    4:     0x55baef17b86c - core::fmt::write::h4b048b90b965d771
[INFO] [stderr]                                at src/libcore/fmt/mod.rs:1030
[INFO] [stderr]    5:     0x55baef15b7a7 - std::io::Write::write_fmt::h3a6d100d8a1e388f
[INFO] [stderr]                                at src/libstd/io/mod.rs:1412
[INFO] [stderr]    6:     0x55baef160325 - std::sys_common::backtrace::_print::ha2961e5db1a6da43
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:65
[INFO] [stderr]    7:     0x55baef160325 - std::sys_common::backtrace::print::h3a868732f7f89b17
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:50
[INFO] [stderr]    8:     0x55baef160325 - std::panicking::default_hook::{{closure}}::hb25db4ba1ba588ba
[INFO] [stderr]                                at src/libstd/panicking.rs:200
[INFO] [stderr]    9:     0x55baef160016 - std::panicking::default_hook::hf1df3f45e1769771
[INFO] [stderr]                                at src/libstd/panicking.rs:214
[INFO] [stderr]   10:     0x55baef160975 - std::panicking::rust_panic_with_hook::ha0342d3096b3c9ed
[INFO] [stderr]                                at src/libstd/panicking.rs:477
[INFO] [stderr]   11:     0x55baef160512 - std::panicking::continue_panic_fmt::hb2f88a6099baa66b
[INFO] [stderr]                                at src/libstd/panicking.rs:384
[INFO] [stderr]   12:     0x55baef160406 - rust_begin_unwind
[INFO] [stderr]                                at src/libstd/panicking.rs:311
[INFO] [stderr]   13:     0x55baef178f7a - core::panicking::panic_fmt::ha4a113bebd34439f
[INFO] [stderr]                                at src/libcore/panicking.rs:85
[INFO] [stderr]   14:     0x55baef178fe7 - core::option::expect_failed::hc3301715da04b562
[INFO] [stderr]                                at src/libcore/option.rs:1190
[INFO] [stderr]   15:     0x55baef1316fa - core::option::Option<T>::expect::hf4ef1b6f6deca865
[INFO] [stderr]                                at /rustc/c9edc02e8320a9e5799d185910ece7d491f524e6/src/libcore/option.rs:345
[INFO] [stderr]   16:     0x55baef12fbbd - build_script_build::main::hdad2e1195abcccea
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/core_collections-0.3.20170409/build.rs:48
[INFO] [stderr]   17:     0x55baef131d50 - std::rt::lang_start::{{closure}}::hd78bf80c455bd23f
[INFO] [stderr]                                at /rustc/c9edc02e8320a9e5799d185910ece7d491f524e6/src/libstd/rt.rs:64
[INFO] [stderr]   18:     0x55baef1603f3 - std::rt::lang_start_internal::{{closure}}::he2a0afb5b578106e
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]   19:     0x55baef1603f3 - std::panicking::try::do_call::h30da202735d45c24
[INFO] [stderr]                                at src/libstd/panicking.rs:296
[INFO] [stderr]   20:     0x55baef1667aa - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:80
[INFO] [stderr]   21:     0x55baef160e6d - std::panicking::try::h974d473864a5ddd4
[INFO] [stderr]                                at src/libstd/panicking.rs:275
[INFO] [stderr]   22:     0x55baef160e6d - std::panic::catch_unwind::h3bd08da23b55a60b
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]   23:     0x55baef160e6d - std::rt::lang_start_internal::hf97f79993a3eaf6a
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   24:     0x55baef131d29 - std::rt::lang_start::h23f58fcaad3d7aea
[INFO] [stderr]                                at /rustc/c9edc02e8320a9e5799d185910ece7d491f524e6/src/libstd/rt.rs:64
[INFO] [stderr]   25:     0x55baef1303ba - main
[INFO] [stderr]   26:     0x7f08e2ab12e1 - __libc_start_main
[INFO] [stderr]   27:     0x55baef1299ba - _start
[INFO] [stderr]   28:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] running `"docker" "inspect" "f0fe5a6d1f84267171ae47858f0c35d1a70529b1646688914d6b2fb770b7e6b5"`
[INFO] running `"docker" "rm" "-f" "f0fe5a6d1f84267171ae47858f0c35d1a70529b1646688914d6b2fb770b7e6b5"`
[INFO] [stdout] f0fe5a6d1f84267171ae47858f0c35d1a70529b1646688914d6b2fb770b7e6b5